Consider using materials you already have at home, such as paper, fabric, or paint, to make simple room decorations. You can make DIY wall art by painting or drawing on canvas, or by making a collage out of scrapbook paper. Another option is to create geometric shapes or patterns on the wall with washi tape. You can also personalise your space by making a photo display out of string and clothespins or a decorative vase out of old jars and paint.